Separable pulley



' (N l 2.Sheets--Sheet 2.

H. J. GILBERT.

SEPARABLE PULLBY. No. 416,457. Patented Dec. 3, 1889.

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UNITED STATE PATENT OFFICE.

HENRY J. GILBERT, OF SAGINANV, MICHIGAN.

SEPARABLE PULLEY.

SPECIFICATION} forming part of Letters Patent No. 416,457, dated December 3, ,1889.

Application filed October 29, 1888. Serial No. 289,372- (No model.)

To all whom it may concern.-

Be it known that I, HENRY J. GILBERT, a citizen of the United States, residing at Saginaw, in the county of Saginaw and State of Michigan, have invented certain new and useful Improvements in separable Pulleys, of"

which the following is afull, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to that class of pul'leys known as separable pulleys]? which are usually made of wood; and it has for its object the improvement in the construction of such pulleys. p

The novelty of my invention will be herein set forth, and specifically pointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of a pulley embodying my invention and applied to a shaft. Fig. 2 is a side elevation representing the manner in which the two parts of the pulley are put together. Fig. 3 is an end elevation of the lefthand section of Fig. 1, with the bushing and wedges in section. Fig. 4 is a View correspondingto Fig. 3, but showing the construction of wide-rim pulleys. Figs. 5, 6, and 7 are side elevations of pulleys, showing modifications in the construction to be referred to more particularly hereinafter. Fig. 8 is a plan view of the pulley Fig. 7, showing the manner of putting the two parts together. Fig. 9 is a plan .view ofthe pulley of Figs. 1, 2, and 3, showing the interlocking joint of the run.

The same letters of reference are used to indicate identical parts in all the figures.

By reference to Figs. 1, 2, and 3 the mode of construction of the pulley and the manner of putting it together and binding it upon the shaft will be readily understood from the following description: The pulley is made in two parts A B, each composed of the central web Ct, built up of layers of wood, secured together with the grain of the layers running at right angles to each other, and having secured thereto the built-up annular portions forming the flanges of the rim 1). The web is provided with a circular central opening a, and the joint uniting the two portions of the web is an interlocking dovetail on each side of the central opening, as represented by the lines cl, Fig. 1, and the flanges of the rim are divided on the lines e, as shown more particularly in Fig. 9, so that when the two portions of the pulley are placed on the shaft and slipped together (see Fig. 2) the rims, as Well as the webs, become interlocked, the joint of the rim and the joint of the web being at right angles to each other and resisting strain on the pulley in different directions.

C is a bushing made to tightly fit the central opening 0 and having a U-shaped recess to receive and center the shaft D, and to fill the recess in the bushing unoccupied by the shaft I employ two wedges E F, inserted from opposite sides, the former E having its side adjacent to the shaft recessed to fit the same snugly, and the latter F having its outer side curved to fit the curvature of the central opening 0. In this way the two parts of the pulley are firmly locked to each other, to the bushing, and to the shaft, and a very simple,

strong, and efficient pulley is produced.

Where a pulley with a very wide rim is desired, it may have two or more webs, as seen in Fig. 4, and in such case it is better to have the webs united by a hub G, into which the bushing and wedges are inserted, as before stated.

My invention is not limited to the shape of the joint to form the interlocking of the webs, as this may be varied in a number of ways, one of which is shown in Fig. 6; nor need the two partsof the pulley he slipped together in line with each other, for, as seen in Figs. 7 and 8, dovetailed tongues and grooves may be formed in the webs to be united by slipping the two portions sidewise, as will be readily understood; but under this construction the advantages of the interlocking joint 6 of the rim, in combination with the interlocking joint (I of the web, are not obtained.

Again, as seen in Fig. 5, a two-part spoke II may be substituted for the webs, in which event one-half of the rim would be secured to one part of the spoke and the other to the other part of the spoke. In this event the two-part spoke would be jointed, so as to be interlocked by the insertion of the bushing and 'wedges through a central opening in said spoke, as will be readily understood.

If desired, a taper sleeve or bushing may be used instead of the U-shaped bushing (J and wedges E F, in which event the central opening 0 would be shaped to conform to the taper of the bushing and the latter would be driven in from one side in the usual manner.

Having thus fully described my invention,

. I claim-- 1. A separable pulley composed of two parts diametrically jointed with interlocking joints and havinga central opening, in combination with a bushing fitted to said central opening and recessed to receive a shaft, and a wedge inserted in the recess in the bushing between the shaft and central opening, substantially as and for the purpose described.

2. A separable pulley composed of two parts diametrically jointed with interlocking joints and having a central opening, in combination with a bushing fitted to said central opening and provided with a U-shaped recess to receive the shaft, and a wedge inserted in the recess in the bushing between the shaft and central opening, substantially as and for the purpose described.

3. A separable pulley havinga central opening and divided through web and rim into two parts, the division of the web being on an irregular linesuch as d-and forming interlocking joints in said web, and the division of o the rim being on an irregular linesuch as (2- transverse to the di viding-line of the web, and also forming interlocking joints in the rim, and a bushing fitting the central opening for preventing the unlocking and separation of the parts, substantially as described.

4. A separable pulley composed of a central web and an outer rim, the web being diametrically divided into two parts on an irregular line which forms a direct interlocking joint between the two parts of said web, and the rim being divided into two parts on irregular lines which form interlocking joints between its parts at right angles to the joint between the two-part web, said web having a central opening, a bushing fitted in said central opening and recessed to receive a shaft, and a wedge inserted in the recess in the bushing between the shaft and central open ing, substantially as and for the purpose described.

5'. A separable pulley composed of a twopart rim and web diametrically jointed with interlocking joints and having a central opening in said web, in combination with a bushin g fitted to said central opening and recessed to receive a shaft, and a wedge or wedges inserted in the recess in the bushing between the shaft and central opening, substantially as and for the purpose described.

6. A separable pulley composed of a twopart rim and web diametrically jointed with interlocking joints and havinga central opening in said web, in combination with a bushing fitted to said central opening and provided with a U-shaped recess to receive a shaft, and two wedges inserted from opposite sides in the recess in the bushing between the shaft and central opening, substantially as and for the purpose described.

7. A separable pulley composed of a central web built up of layers of wood,with the grain of the several layers crossing each other, an outer rim, the web being diametrically divided in two parts on an irregular line which forms a direct interlocking joint between the two parts of said web, and the rim being divided into two parts on irregular lines which form interlocking joints between its parts at rightangles to the joint between the two-part web, and said web having a central opening larger than the shaft, and a wedge-bushing fitting in said opening, substantially as and for the purpose described.

8. The herein-described separable pulley, composed of the two parts A and 13, having the central opening 0, with interlocking joints d e, the U-shaped bushing G, and wedges E 1 substantially as and for the purpose described.

HENRY J. GILBERT.

Witnesses:

GEORGE W. BURNl-IAM, N. S. Woon. 

